Hi I’ve had most of my bathroom skimmed ready for the units. I decided not to have the tiled/wet area done as it’s going to be tiled. Now, looking at it I’d like to just apply a thin amount over the shower wall to even it up but looks like I’ll need to get a 25kg multi finish bag. Way too much and likely it will expire before doing any other plastering jobs that are needed. Just wondering if there’s smaller bags available. Any help appreciated.